CN107958189B

CN107958189B - Anti-aliasing imaging element, photosensitive module, display module and electronic equipment

Info

Publication number: CN107958189B
Application number: CN201710708254.2A
Authority: CN
Inventors: 李问杰
Original assignee: Shenzhen Sunwave Technology Co Ltd
Current assignee: Liuzhou Zibo Technology Co.,Ltd.
Priority date: 2017-08-17
Filing date: 2017-08-17
Publication date: 2021-03-02
Anticipated expiration: 2037-08-17
Also published as: CN107958189A

Abstract

The invention discloses an anti-aliasing imaging element, a photosensitive module, a display module and electronic equipment. The anti-aliasing imaging element comprises a light absorption wall, a plurality of first light transmission areas and a plurality of second light transmission areas, wherein the plurality of first light transmission areas and the plurality of second light transmission areas are formed by enclosing the light absorption wall, and the cross section area of the second light transmission areas is larger than that of the first light transmission areas. The sensitization module, the display module assembly and the electronic equipment all include the anti-aliasing imaging element.

Description

Anti-aliasing imaging element, photosensitive module, display module and electronic equipment

Technical Field

The invention relates to an anti-aliasing imaging element for sensing biological characteristic information, a photosensitive module, a display module and electronic equipment.

Background

At present, a biological information sensor, especially a fingerprint sensor, has gradually become a standard component of electronic products such as mobile terminals. Because optical fingerprint identification sensor has stronger penetrability than capacitanc fingerprint identification sensor, consequently someone proposes an optical fingerprint identification module who is applied to mobile terminal. As shown in fig. 1, the optical fingerprint recognition module includes an optical fingerprint sensor 400 and a light source 402. The optical fingerprint sensor 400 is disposed under a protective cover 401 of the mobile terminal. The light source 402 is disposed adjacent to one side of the optical fingerprint recognition sensor 400. When the finger F of the user touches the protective cover 401, the light signal emitted from the light source 402 passes through the protective cover 401 and reaches the finger F, is reflected by the valleys and ridges of the finger F, and is received by the optical fingerprint recognition sensor 400, and forms a fingerprint image of the finger F.

However, the image obtained by the optical fingerprint identification module is blurred and needs to be improved.

Disclosure of Invention

The embodiment of the invention aims to solve at least one technical problem in the prior art. Therefore, the embodiment of the invention needs to provide an anti-aliasing imaging element, a photosensitive module, a display module and an electronic device.

The anti-aliasing imaging element comprises a light absorption wall, a plurality of first light transmission areas and a plurality of second light transmission areas, wherein the plurality of first light transmission areas and the plurality of second light transmission areas are surrounded by the light absorption wall, and the cross section area of the second light transmission areas is larger than that of the first light transmission areas.

The anti-aliasing imaging element of the embodiment of the invention can be applied to optical sensing and used for sensing the biological characteristic information, so that the sensed biological characteristic information is clearer.

In some embodiments, the light absorbing wall includes a plurality of light absorbing blocks and block-up blocks alternately stacked. The light absorption wall is formed by the stacking of the block with the block.

In some embodiments, the raised block is made of a transparent material.

In some embodiments, the raised blocks located at different layers have unequal thicknesses. By setting the thickness of the heightening block, the interference signal is prevented from passing through the anti-aliasing imaging element, and the anti-aliasing effect of the anti-aliasing imaging element is improved.

In some embodiments, the first and second light-transmitting regions are filled with a transparent material. Transparent materials are filled in the first light transmission area and the second light transmission area, so that the strength of the anti-aliasing imaging element is increased, and the influence on the light transmission effect caused by impurities entering the first light transmission area and the second light transmission area can be avoided.

The embodiment of the invention provides an anti-aliasing imaging element, which comprises a plurality of light absorption layers and transparent supporting layers which are alternately stacked; the light absorption layer comprises a plurality of light absorption blocks arranged at intervals, and a plurality of first intervals and a plurality of second intervals are formed among the light absorption blocks; the transparent supporting layer is formed by filling a transparent material and fills the first interval and the second interval together; the area corresponding to the first interval forms a first light-transmitting area, and the area corresponding to the second interval forms a second light-transmitting area.

Through the light absorption layer and the transparent supporting layer which are alternately stacked, the anti-aliasing imaging element is simpler to prepare, and the anti-aliasing effect of the anti-aliasing imaging element is ensured.

In certain embodiments, the thickness of each of the transparent support layers is not equal.

In certain embodiments, the thickness of the transparent support layer increases from layer to layer.

Through the thickness setting of the transparent supporting layer, interference signals are prevented from passing through the anti-aliasing imaging element, and therefore the anti-aliasing effect of the anti-aliasing imaging element is improved.

An embodiment of the present invention provides a photosensitive module, including:

the photosensitive device comprises a photosensitive panel for sensing optical signals; and

an anti-aliasing imaging element located above the light-sensing panel, the anti-aliasing imaging element being any of the anti-aliasing imaging elements of the above embodiments.

In some embodiments, the anti-aliasing imaging element is directly formed on the photosensitive panel, or the anti-aliasing imaging element is separately manufactured and then disposed on the photosensitive panel.

In some embodiments, the photosensitive module is further configured to sense predetermined biometric information of a target object approaching or contacting the photosensitive module.

Because the reflection of different parts of the target object to the optical signal is different, the optical signal sensed by the photosensitive panel can be aliased, so that the acquired biological characteristic information is fuzzy, and the sensing precision of the photosensitive module is improved by arranging the anti-aliasing imaging element on the photosensitive panel.

In addition, the light sensing module provided by the invention not only realizes the sensing of the biological characteristic information of the target object in the display area, but also realizes the sensing of the biological characteristic information of the target object at any position in the display area.

An embodiment of the present invention provides a display module, including:

a display device including a display panel for performing image display;

the light sensing module is arranged below the display panel and used for sensing light signals to acquire preset biological characteristic information of a target object contacting or approaching the display panel.

In the embodiment of the invention, the display module comprises the photosensitive module of any one of the above embodiments, so that the display module has all the technical effects of the photosensitive module. In addition, the light sensing module utilizes the optical signal sent by the display device to sense the biological characteristic information of the target object, thereby saving the light source and reducing the cost of the display module.

An embodiment of the present invention provides an electronic device, including the anti-aliasing imaging element, the photosensitive module, or the display module according to any one of the above embodiments. Therefore, the electronic equipment has all the beneficial effects of the anti-aliasing imaging element, the photosensitive module and the display module.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of embodiments of the invention.

Drawings

The above and/or additional aspects and advantages of embodiments of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic diagram of an optical sensing structure applied to an electronic device in the prior art;

FIG. 2 is a schematic view of a partial structure of a light-sensing panel according to an embodiment of the present invention;

FIG. 3 is a schematic diagram of optical signals that can be passed through by the anti-aliasing imaging element in the photosensitive module shown in FIG. 2;

FIG. 4 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to an embodiment of the invention;

FIG. 5 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to another embodiment of the invention;

FIG. 6 is a process for forming an anti-aliasing imaging element according to an embodiment of the invention;

FIG. 7 is a schematic diagram of a partial structure of an anti-aliasing imaging element according to yet another embodiment of the invention;

FIG. 8 is a schematic view of a partial structure of a photosensitive module according to another embodiment of the invention;

FIG. 9 is a block diagram of a photosensitive device according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of one embodiment of the photosensitive unit shown in FIG. 9;

FIG. 11 is a schematic structural view of another embodiment of the photosensitive unit shown in FIG. 9;

FIG. 12 is a schematic view of a partial structure of a display module according to an embodiment of the invention;

FIG. 13 is a diagram illustrating a relationship between a display area of a display panel and a sensing area of a light-sensing panel according to an embodiment of the present invention;

FIG. 14 is a schematic view of a partial structure of a display module according to another embodiment of the present invention;

fig. 15 is a schematic front view of a display module according to an embodiment of the invention applied to an electronic device;

fig. 16 is a schematic cross-sectional structure of the electronic device in fig. 15 along the line I-I, in which only a partial structure of the electronic device is shown.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. "contact" or "touch" includes direct contact or indirect contact. For example, the photosensitive module and the display module disclosed below are disposed inside the electronic device, such as under the protective cover, and the finger of the user indirectly contacts the photosensitive module and the display module through the protective cover.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The following disclosure provides many different embodiments or examples for implementing different features of the invention. To simplify the disclosure of the present invention, the components and settings of a specific example are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or reference letters in the various examples, which have been repeated for purposes of simplicity and clarity and do not in themselves dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

Further, the described features, structures, or characteristics may be combined in any suitable manner in one or more embodiments. In the following description, numerous specific details are provided to provide a thorough understanding of embodiments of the invention. One skilled in the relevant art will recognize, however, that the invention can be practiced without one or more of the specific details, or with other structures, components, and so forth. In other instances, well-known structures or operations are not shown or described in detail to avoid obscuring the invention.

In some embodiments, referring to fig. 2, fig. 2 shows a partial structure of a photosensitive module according to an embodiment of the invention. The photosensitive module 2 includes a photosensitive device 20 (see fig. 9) and an anti-aliasing imaging element 28. The photosensitive device 20 further includes a photosensitive panel 200, the photosensitive panel 200 includes a plurality of third light-transmitting regions P1 for light signals to pass through and a non-light-transmitting region P2, and the photosensitive unit 22 is disposed in the non-light-transmitting region P2. The light sensing unit 22 is used for sensing a light signal and converting the sensed light signal into a corresponding electrical signal. The light sensing device 20 is further configured to convert the sensed optical signal into an electrical signal, and acquire predetermined biometric information of a target object contacting or approaching the light sensing panel 200 according to the converted electrical signal. The anti-aliasing imaging element 28 is disposed above the photosensitive panel 200, and is used for preventing aliasing of the optical signals received between the adjacent photosensitive units 22. Further, the anti-aliasing imaging element 28 includes a plurality of first light transmission regions 282 through which light signals pass and a plurality of second light transmission regions 285, the second light transmission regions 285 are provided corresponding to the third light transmission regions P1, and the plurality of light sensing units 22 are provided corresponding to the first light transmission regions 282 for receiving light signals passing through the first light transmission regions 282.

The biometric information of the target object includes, but is not limited to, skin texture information such as fingerprints, palm prints, ear prints, and soles of feet, and other biometric information such as heart rate, blood oxygen concentration, and veins. The target object is, for example, but not limited to, a human body, and may be other suitable types of objects.

The photosensitive module 2 according to the embodiment of the present invention has the anti-aliasing imaging element 28 disposed on the photosensitive panel 200, so that the photosensitive unit 22 obtains accurate biometric information after performing the photosensitive process, thereby improving the sensing accuracy of the photosensitive device 20.

In some embodiments, the light sensing unit 22 is disposed opposite to the first light-transmitting area 282, so that it can be ensured that all the light signals passing through the first light-transmitting area 282 are received by the light sensing unit 22, and the sensing accuracy of the light sensing device 20 is improved.

In some embodiments, the anti-aliasing imaging element 28 has a light absorption property, and of the light signals irradiated onto the anti-aliasing imaging element 28, only the light signals approximately perpendicular to the photosensitive panel 200 can pass through the first light-transmitting region 282 and the second light-transmitting region 285 of the anti-aliasing imaging element 28, and the rest of the light signals are absorbed by the anti-aliasing imaging element 28, and the photosensitive unit 22 is disposed corresponding to the first light-transmitting region 282, so that only the light signals passing through the first light-transmitting region 282 are received by the photosensitive unit 22. In this manner, aliasing of the optical signals received between adjacent light-sensing units 22 can be prevented. It should be noted that the optical signal approximately perpendicular to the photosensitive panel 200 includes an optical signal perpendicular to the photosensitive panel 200 and an optical signal within a predetermined angle offset from the vertical direction of the photosensitive panel 200. The preset angle range is within ± 20 °.

In some embodiments, with combined reference to fig. 2 and 3, fig. 3 illustrates the range of optical signals passing through the anti-aliasing imaging components 28. Due to the light absorption characteristics of the anti-aliasing imaging element 28, only the light signal between the light signal L1 and the light signal L2 can reach the light sensing unit 22 through the first light-transmitting region 282, and the rest of the light signal is absorbed by the light-absorbing wall 281 of the anti-aliasing imaging element 28. Alternatively, the first light-transmitting region 282 is exemplified by a circular hole, and as can be seen from fig. 3, the smaller the aperture of the first light-transmitting region 282 is, the smaller the range of the angle α of the optical signal passing through the first light-transmitting region 282 is, and therefore the better the anti-aliasing effect of the anti-aliasing imaging element 28 is. In this manner, the anti-aliasing effect of the anti-aliasing imaging element 28 can be improved by the smaller aperture first light-transmitting region 282 provided for the anti-aliasing imaging element 28. In addition, since the aperture of the first light-transmitting region 282 of the anti-aliasing imaging element 28 is small, each of the light-sensing units 22 corresponds to a plurality of first light-transmitting regions 282, so that the light-sensing units 22 can sense sufficient light signals, and the sensing accuracy of the light-sensing module 2 is improved.

In some embodiments, with continued reference to fig. 2, the anti-aliasing imaging element 28 includes an absorbing wall 281, and the first light-transmitting region 282 and the second light-transmitting region 285 are formed by enclosing the absorbing wall 282. The light absorbing walls 281 are formed of a light absorbing material. The light absorbing material includes metal oxides, carbon black paint, black ink, and the like. The metal in the metal oxide is, for example, but not limited to, one or more of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), and molybdenum (Mo). The axial direction of the first light-transmitting region 282 and the second light-transmitting region 285 is a direction perpendicular to the photosensitive panel 200, so that, of the light signals irradiated to the anti-aliasing imaging element 28, the light signals in a direction approximately perpendicular to the photosensitive panel 200 can pass through the first light-transmitting region 282 and the second light-transmitting region 285, and the rest of the light signals are absorbed by the light-absorbing wall 281.

Further, referring to fig. 4, fig. 4 shows a structure of the anti-aliasing imaging element 28 according to an embodiment of the invention. The light absorption wall 281 has a multi-layer structure, and includes light absorption blocks 281a and block elevations 281b alternately stacked. In one embodiment, the light absorbing blocks 281a are formed of a light absorbing material. Such as, but not limited to, metal oxides, carbon black coatings, black inks, and the like. The metal in the metal oxide is, for example, but not limited to, one or more of chromium (Cr), nickel (Ni), iron (Fe), tantalum (Ta), tungsten (W), titanium (Ti), and molybdenum (Mo). The raised blocks 281b are, for example, but not limited to, transparent layers formed of transparent materials, such as translucent materials, light absorbing materials, and the like.

In some embodiments, the light absorption blocks 281a in the same layer are spaced apart, and a region corresponding to a first space 281c between the light absorption blocks 281a in the same layer is a first light transmission region 282, and a region corresponding to a second space 281d between the light absorption blocks 281a is a second light transmission region 285. Further, the plurality of light absorption blocks 281a and the plurality of block-up blocks 281b of the same layer may be manufactured at one time. Specifically, by providing a mask, the mask is an integrally formed film, and the film is formed with openings corresponding to the positions of the light absorbing blocks 281a, the shape and size of the openings are consistent with the shape and size of the light absorbing blocks 283, and the intervals of the openings include a first interval 281c and a second interval 281 d. Similarly, the plurality of raised blocks 281b in the same layer may be formed by the mask evaporation method. The light absorbing blocks 281a and the elevation blocks 281b alternately stacked are thus sequentially vapor-deposited on a support through the mask, thereby forming the anti-aliasing imaging element 28.

In the embodiment of the present invention, the height of the padding block 281b is set to not only speed up the process of the anti-aliasing imaging device 28, but also ensure the anti-aliasing effect of the anti-aliasing imaging device 28. For example, by setting the heights of the height pads 281b of different layers, light signals which are not shifted by ± 20 ° from the vertical direction of the photosensitive panel 200 can be prevented from passing through the height pads 281b, thereby improving the sensing accuracy of the photosensitive module 2.

In some embodiments, the first light-transmitting region 282 and the second light-transmitting region 285 can be filled with transparent materials to increase the strength of the anti-aliasing imaging element 28, and to prevent impurities from entering the first light-transmitting region 282 and the second light-transmitting region 285 to affect the light-transmitting effect. In order to ensure the light transmission effect of the first light transmission region 282 and the second light transmission region 285, the transparent material may be a material with a relatively high light transmission rate, such as glass, PMMA (acrylic), PC (polycarbonate), or the like.

In some embodiments, referring to fig. 5, fig. 5 shows a structure of an anti-aliasing imaging element according to another embodiment of the invention. The anti-aliasing imaging element 28 is a multilayer structure, and the anti-aliasing imaging element 28 comprises light absorbing layers 283 and transparent support layers 284 which are alternately stacked; the light absorbing layer 283 includes a plurality of light absorbing blocks 283a arranged at intervals. Also, the plurality of light absorption blocks 283a form a first space 283b and a second space 283c therebetween. The transparent support layer 284 is formed by filling a transparent material, and also fills the first and

second spaces

283b and 283c between the light absorption blocks 283 a. The region corresponding to the first space 283b is a first light-transmitting region 282, and the region corresponding to the second space 283c is a second light-transmitting region 285.

Further, referring to fig. 6, fig. 6 shows a process for manufacturing the anti-aliasing imaging element according to an embodiment of the invention. Specifically, when the anti-aliasing imaging element 28 is manufactured, a layer of light absorbing material is coated on a carrier, and the light absorbing material layer is etched away from the portions corresponding to the first light transmitting region 282 and the second light transmitting region 285, so that the plurality of light absorbing blocks 283a are formed on the non-etched portions. Such as, but not limited to, photolithography, X-ray lithography, electron beam lithography, and ion beam lithography. And the etching type may include both dry etching and wet etching. Then, a transparent material is coated on the etched light absorption blocks 283, and the transparent material not only covers the plurality of light absorption blocks 283a, but also fills the first and

second spaces

283b and 283c between the plurality of light absorption blocks 283a, thereby forming the transparent support layer 284. Then, a plurality of light absorbing blocks 283a are formed on the transparent support layer 284 in the manner in which the light absorbing layer 283 is formed, and so on, a plurality of light absorbing layers 283 and transparent support layers 284 which are alternately laminated are formed, thereby forming the anti-aliasing imaging element 28.

Further, in order to ensure the light transmission effect of the first light transmission region 282 and the second light transmission region 285, the transparent material forming the transparent support layer 284 may be a material with a relatively high light transmission rate, such as glass, PMMA (acrylic), PC (polycarbonate), epoxy resin, or the like.

In some embodiments, referring to fig. 7, fig. 7 shows a structure of an anti-aliasing imaging element according to another embodiment of the invention. The anti-aliasing imaging element 28 comprises light absorbing layers 283 and transparent support layers 284 arranged alternately in layers, with the thicknesses of the transparent support layers 284 of the different layers being unequal. I.e., thicknesses h1, h2, and h3 in fig. 7 are not equal in value. Optionally, the thickness of the transparent support layer 284 increases layer by layer, i.e., h1 < h2 < h 3. Therefore, the light signals which are not shifted by plus or minus 20 degrees relative to the vertical direction of the photosensitive panel can be prevented from passing through the transparent supporting layer 284 between the light absorbing blocks 283a, so that the sensing precision of the photosensitive module 2 is improved. It should be noted that the thickness parameter of each transparent supporting layer 284 and the width and height parameters of the light absorbing block 283a can be set differently and in various combinations to improve the sensing accuracy of the photosensitive module 2.

In some embodiments, the anti-aliasing imaging components 28 are formed directly on the photosensitive panel 200, i.e., the anti-aliasing imaging components 28 are formed on the photosensitive panel 200 with the photosensitive cells 22. Alternatively, the anti-aliasing imaging device 28 is formed separately and then disposed on the photosensitive panel 200 having the photosensitive unit 22, thereby speeding up the manufacturing process of the photosensitive module 2.

In some embodiments, taking an object as an organism such as a finger as an example, when the finger contacts or approaches the photosensitive module 2, if the finger is irradiated with ambient light, and the finger has many tissue structures such as epidermis, bone, flesh, blood vessels, etc., part of the optical signal in the ambient light penetrates the finger, and part of the optical signal is absorbed by the finger. The light signal penetrating through the finger reaches the light sensing unit 22, and at this time, the light sensing unit 22 not only senses the light signal reflected by the target object, but also senses the light signal of the environment light penetrating through the finger, so that accurate sensing cannot be performed. Therefore, to avoid the influence of the ambient light on the sensing of the target object by the photosensitive unit 22, please refer to fig. 8, and fig. 8 shows a structure of a photosensitive module according to another embodiment of the present invention. The photosensitive module 2 further includes a filter 29, and the filter 29 is disposed between the anti-aliasing imaging device 28 and the photosensitive panel 200 and corresponds to the photosensitive unit 22. The filter film is used for filtering light signals outside a preset wave band. Alternatively, the anti-aliasing imaging component 28 is disposed between the filter 29 and the photosensitive panel 200, for example, the filter 29 is disposed on a side of the anti-aliasing imaging component 28 away from the photosensitive panel 200.

In the embodiment of the invention, the optical filter 29 filters the optical signals outside the preset waveband from the reflected optical signals, thereby improving the sensing accuracy of the photosensitive module 2.

In some embodiments, the predetermined wavelength band is a wavelength band corresponding to the blue light signal, i.e., the filter 29 filters out light signals other than the blue light signal.

In some embodiments, the predetermined wavelength band is a wavelength band corresponding to green light signals, i.e., the filter 29 filters light signals other than the green light signals.

Among the red light signal, the blue light signal, and the green light signal of the ambient light, the target object F such as a finger absorbs the red light signal weakest, and absorbs the blue light signal strongest next to the green light signal. I.e. ambient light is shining on the finger, a large amount of the blue light signal is absorbed by the finger, and only a small amount, even no blue light signal penetrates the finger. Therefore, the light signals of the wavelength bands other than the blue light signals or the green light signals are selected for filtering, so that the interference of the ambient light can be greatly eliminated, and the sensing precision of the photosensitive module 2 is improved.

Referring to fig. 2, the light-sensing panel 200 includes a transparent substrate 26 and a plurality of light-sensing units 22 formed on the transparent substrate 26. The transparent substrate 26 is not limited to a glass substrate, a plastic substrate, crystal, sapphire, etc., and the transparent substrate 26 may be a rigid material or a flexible material, such as a flexible film. If the transparent substrate 26 is made of a flexible material, the photosensitive module 2 not only has a thin thickness, but also can be applied to an electronic device having a curved display screen.

In some embodiments, referring to fig. 9, fig. 9 shows a structure of a photosensitive device according to an embodiment of the invention. The photosensitive device 20 includes a photosensitive panel 200, a plurality of photosensitive units 22 are distributed on a transparent substrate 26 in an array, and a scan line group and a data line group electrically connected to the photosensitive units 22 are formed on the transparent substrate 26, for example, the scan line group is used for transmitting a scan driving signal to the photosensitive units 22 to activate the photosensitive units 22 to perform optical sensing, and the data line group is used for outputting an electrical signal generated by the photosensitive units performing optical sensing. The transparent substrate 26 is, for example, but not limited to, a silicon substrate, a metal substrate, a printed circuit board, or the like.

Specifically, the photosensitive units 22 are distributed in an array, such as a matrix. Of course, other regular or irregular distributions are also possible. The scan line group includes a plurality of scan lines 201, the data line group includes a plurality of data lines 202, and the plurality of scan lines 201 and the plurality of data lines 202 are disposed to cross each other and disposed between the adjacent photosensitive cells 22. For example, a plurality of scan lines G1, G2 … Gm are arranged at intervals in the Y direction, and a plurality of data lines S1, S2 … Sn are arranged at intervals in the X direction. However, the plurality of scan lines 201 and the plurality of data lines 202 may be arranged at a certain angle, for example, 30 ° or 60 °, instead of being arranged perpendicularly as shown in fig. 9. In addition, due to the conductivity of the scan lines 201 and the data lines 202, the scan lines 201 and the data lines 202 at the crossing positions are isolated from each other by an insulating material.

It should be noted that the arrangement of the distribution and number of the scanning lines 201 and the data lines 202 is not limited to the above-mentioned exemplary embodiment, and corresponding scanning line groups and data line groups may be correspondingly arranged according to the structure of the photosensitive unit 22.

Furthermore, the plurality of scanning lines 201 are connected to a photosensitive driving circuit 23, and the plurality of data lines 202 are connected to a signal processing circuit 25. The photosensitive driving circuit 23 is configured to provide a corresponding scanning driving signal, and transmit the scanning driving signal to the corresponding photosensitive unit 22 through the corresponding scanning line 201, so as to activate the photosensitive unit 22 to perform the light sensing. The photosensitive driving circuit 23 is formed on the transparent substrate 26, and may be electrically connected to the photosensitive unit 22 through a connecting member (e.g., a flexible circuit board), that is, connected to the plurality of scanning lines 201. The signal processing circuit 25 receives an electric signal generated by the corresponding light sensing unit 22 performing light sensing through the data line 202, and acquires biometric information of the target object based on the electric signal.

In some embodiments, the photosensitive device 20 including the photosensitive panel 200 further includes a controller 27, in addition to the signal processing circuit 25 and the photosensitive driving circuit 23, the controller 27 is configured to control the driving circuit to output a corresponding scanning driving signal, such as but not limited to activating the photosensitive units 22 line by line to perform the photosensitive process. The controller 27 is further configured to control the signal processing circuit 25 to receive the electrical signals output by the light sensing units 22, and generate the biometric information of the target object according to the electrical signals after receiving the electrical signals output by all the light sensing units 22 performing the light sensing.

Further, the signal processing circuit 25 and the controller 27 are electrically connected to the light sensing unit 22 through a connector (e.g., a flexible circuit board).

In some embodiments, referring to fig. 10, fig. 10 illustrates a connection structure of the light sensing unit 22, the scan line 201 and the data line 202 according to an embodiment. The light sensing unit 22 includes at least one light sensing device 220 and a switching device 222. The switch device 222 has a control terminal C and two signal terminals, such as a first signal terminal Sn1 and a second signal terminal Sn 2. The control terminal C of the switching device 222 is connected to the scan line 201, the first signal terminal Sn1 of the switching device 222 is connected to a reference signal L via the photo sensor 220, and the second signal terminal Sn2 of the switching device 222 is connected to the data line 202. It should be noted that the photosensitive unit 22 shown in fig. 10 is for illustration only, and is not limited to other constituent structures of the photosensitive unit 22.

Specifically, the photosensitive device 220 may be, for example, but not limited to, any one or more of a photodiode, a phototransistor, a photodiode, a photoresistor, and a thin film transistor. Taking a photodiode as an example, negative voltages are applied to two ends of the photodiode, at this time, when the photodiode receives an optical signal, a photocurrent proportional to the optical signal is generated, and the larger the intensity of the received optical signal is, the higher the generated photocurrent is, the higher the speed of voltage drop on the cathode of the photodiode is, so that by collecting voltage signals on the cathode of the photodiode, the intensities of optical signals reflected by different parts of a target object are obtained, and further, biological characteristic information of the target object is obtained. It is understood that a plurality of the light sensing devices 220 are provided if the light sensing effect of the light sensing devices 220 is to be increased.

Further, the switching device 222 is, for example, but not limited to, any one or more of a triode, a MOS transistor, and a thin film transistor. Of course, the switching device 222 may also include other types of devices, and the number may also be 2, 3, etc.

In some embodiments, in order to further improve the sensing accuracy of the photo sensor module 2, the photo sensor device 220 with high sensitivity to blue or green light signals may be selected. The light sensing is performed by selecting the light sensing device 220 with high light sensing sensitivity to the blue light signal or the green light signal, so that the light sensing device 220 is more sensitive to the light sensing of the blue light signal or the green light signal, and therefore, the interference caused by the red light signal in the ambient light is also avoided to a certain extent, and the sensing precision of the light sensing module 2 is improved.

Taking the structure of the light sensing unit 22 shown in fig. 10 as an example, the gate of the thin film transistor TFT is used as the control terminal C of the switching device 222, and the source and the drain of the thin film transistor TFT correspond to the first signal terminal Sn1 and the second signal terminal Sn2 used as the switching device 222. The gate of the thin film transistor TFT is connected to the scanning line 201, the source of the thin film transistor TFT is connected to the cathode of the photodiode D1, and the drain of the thin film transistor TFT is connected to the data line 202. The anode of the photodiode D1 is connected to a reference signal L, which is, for example, a ground signal or a negative voltage signal.

When the photosensitive unit 22 performs the photosensitive process, a driving signal is applied to the gate of the thin film transistor TFT through the scanning line 201 to drive the thin film transistor TFT to be turned on. At this time, the data line 202 is connected to a positive voltage signal, when the TFT is turned on, the positive voltage signal on the data line 202 is applied to the cathode of the photodiode D1 through the TFT, and since the anode of the photodiode D1 is grounded, a reverse voltage is applied across the photodiode D1, so that the photodiode D1 is in a reverse bias state, i.e., in an operating state. At this time, when an optical signal is irradiated to the photodiode D1, the reverse current of the photodiode D1 rapidly increases, thereby causing a current change on the photodiode D1, which can be obtained from the data line 202. Since the larger the intensity of the optical signal is, the larger the generated reverse current is, the intensity of the optical signal can be obtained according to the current signal acquired on the data line 202, and thus the image information of the target object can be obtained.

In some embodiments, the reference signal L may be a positive voltage signal, a negative voltage signal, a ground signal, or the like. It is within the scope of the present invention that the electrical signal provided on the data line 202 and the reference signal L are applied to both ends of the photodiode D1, so that a reverse voltage is formed across the photodiode D1 to perform the light sensing.

It is to be understood that the connection method of the thin film transistor TFT and the photodiode D1 in the light sensing unit 22 is not limited to the connection method shown in fig. 10, and may be other connection methods. For example, as shown in fig. 11, a connection structure of the photosensitive unit 22 with the scanning line 201 and the data line 202 according to another embodiment of the present invention is shown. The gate G of the thin film transistor TFT is connected to the scanning line 201, the drain D of the thin film transistor TFT is connected to the positive electrode of the photodiode D1, and the source S of the thin film transistor TFT is connected to the data line 202. The cathode of the photodiode D1 is connected to a positive voltage signal.

In some embodiments, the switching device 222 may be disposed below the light sensing device 220, or the switching device 222 may be disposed partially overlapping the light sensing device 220. The scan line 201 and the data line 202 may also be disposed under the switching device 222. This makes the arrangement of the light sensing units 22, the scan lines 201 and the data lines 202 more compact, and increases the light sensing area of the light sensing device 220 in the case of limited arrangement area, thereby enhancing the sensing effect of the light sensing panel 200.

In particular, in some embodiments, the semiconductor layer and the upper electrode of the photosensitive device 220 may also extend above the switching device 222 to increase the sensing area. Taking the photosensitive device 220 as a photodiode as an example, the anode and the semiconductor layer of the photodiode extend above the switching device 222 to cover the switching device 222, and a light shielding layer is further disposed above the region of the anode corresponding to the switching device 222 to prevent light from irradiating the switching device 222. The cathode of the photodiode is connected to the switching device 222. The cathode is a lower electrode, and is made of a non-light-transmitting conductive material, such as a metal material.

Referring to fig. 12, fig. 12 shows a partial structure of a display module 1 according to an embodiment of the invention. The display module 1 includes a display device (not shown) and a photosensitive module 2. The display device further includes a display panel 100 for performing image display. The photo sensor module 2 is the photo sensor module 2 of any of the above embodiments, and the photo sensor module 2 is disposed above the display panel 100 for sensing the optical signal to obtain the predetermined biometric information of the target object contacting or approaching the display module 1.

Specifically, the display panel 100 includes a plurality of display pixels 12, and adjacent display pixels 12 have a space H therebetween. The photosensitive module 2 includes a photosensitive panel 200. Since the photosensitive panel 200 of the photosensitive module 2 is located above the display panel 100, in order not to affect the display of the display panel 100, the photosensitive panel 200 of the photosensitive module 2 is provided with a third light-transmitting region P1, and the third light-transmitting region P1 is disposed corresponding to the display pixels 12 for the light signals emitted by the display panel 100 to pass through. In some embodiments, in order to improve the display effect of the display panel, the area of the third light transmission region P1 is slightly larger than the area of the display pixel 12.

In addition, since the scanning lines 201, the data lines 202, and the light receiving devices 220 on the substrate 26 have opaque characteristics and the switching devices 222 are prevented from being affected by the light signals applied to the switching devices 222, the regions of the substrate 26 where the scanning lines 201, the data lines 202, the light receiving devices 220, and the switching devices 222 are formed are opaque regions of the photosensitive panel 200. The non-light-transmitting region is located above the gap H of the display panel 100. Accordingly, the switching device 222 and the light sensing device 220 are located in the non-light-transmitting region. It is understood that if the components disposed on the photosensitive panel 200 can realize light transmission or omit some components having opaque structures, the non-light-transmission region can also become the third light-transmission region P1. For example, in some embodiments, the scan lines 201 and the data lines 202 may also be made of a transparent conductive material and located in the third light-transmitting region P1. Therefore, in the embodiment of the present invention, the positions and sizes of the third light transmitting region P1 and the non-light transmitting region are not strictly limited, and can be flexibly adjusted according to actual conditions.

In some embodiments, with continued reference to fig. 12, the anti-aliasing imaging components 28 and the photosensitive panel 200 in the photosensitive module 2 are stacked on the display panel 100, i.e., the photosensitive panel 200 is located between the anti-aliasing imaging components 28 and the display panel 100.

In some embodiments, the surface of the photosensitive panel 200 and the surface of the display panel 100 that are bonded to each other share the same substrate, for example, the surface of the display panel 100 that is bonded to the photosensitive panel 100 is a protective substrate, and the photosensitive units 22 in the photosensitive panel 200 are directly disposed on the protective substrate. By sharing one substrate with the display panel 100 through the photosensitive panel 200, the substrate 26 is saved, and the thickness of the display module is reduced.

When the display module 1 is in operation, the display panel 100 emits light signals to achieve a corresponding display effect. At this time, if a target object touches or touches the display module 1, the optical signal emitted by the display panel 100 reaches the target object and is reflected, the reflected optical signal is received by the photosensitive panel 200, and the photosensitive panel 200 converts the received optical signal into an electrical signal corresponding to the optical signal. The signal processing circuit 25 (see fig. 9) in the photosensitive module 2 obtains the predetermined biometric information of the target object according to the electrical signal generated by the photosensitive panel 200.

Further, the display device further includes a display driving circuit (not shown) for driving the plurality of display pixels to emit light, so as to be used as a light source for the photosensitive module to perform light sensing. The display driving circuit may be disposed on the display panel 100, or may be connected to the display pixels 12 through a flexible circuit board.

Further, the display device is further configured to perform touch sensing, and the display driving circuit drives the display pixels corresponding to the touch area to emit light after the display device detects a touch or proximity of a target object.

In some embodiments, the light sensing panel 200 is used to perform biometric information sensing of a target object anywhere within the display area of the display panel 100. Specifically, for example, referring to fig. 12 and 13 in combination, the display panel 100 has a display area 101 and a non-display area 102, the display area 101 is defined by light emitting areas of all the display pixels 12 of the display panel 100, an area outside the display area 101 is the non-display area 102, and the non-display area 102 is used for setting circuits such as a display driving circuit for driving the display pixels 12 or a circuit bonding area for connecting a flexible circuit board. The photosensitive panel 200 has a sensing region 203 and a non-sensing region 204, the sensing region 203 is defined by the sensing regions of all the photosensitive units 22 of the photosensitive panel 200, the region outside the sensing region 203 is the non-sensing region 204, and the non-sensing region 204 is used for setting circuits such as the photosensitive driving circuit 23 for driving the photosensitive units 22 to perform the photosensitive process or a circuit bonding region for connecting a flexible circuit board. The shape of the sensing region 203 is consistent with the shape of the display region 101, and the size of the sensing region 203 is larger than or equal to the size of the display region 101, so that the light sensing panel 200 can sense the predetermined biometric information of the target object contacting or approaching any position of the display region 101 of the display panel 100. Further, the area of the photosensitive panel 200 is smaller than or equal to the area of the display panel 100, and the shape of the photosensitive panel 100 is consistent with the shape of the display panel 100, so that the assembly of the photosensitive panel 200 and the display panel 100 is facilitated. However, alternatively, in some embodiments, the area of the photosensitive panel 200 may be larger than that of the display panel 100.

In some embodiments, the sensing region 203 of the light sensing panel 200 may also be smaller than the display region 101 of the display panel 100, so as to realize sensing of the predetermined biometric information of the target object in the local display region 101 of the display panel 100.

In some embodiments, referring to fig. 14, fig. 14 shows a partial structure of a display module according to another embodiment of the present invention. The display pixel 12 includes three display pixels, i.e., a red pixel R, a green pixel G, and a blue pixel B, and is not limited to other pixel structures of the display pixel 12. For example, the display pixels may also be black and white pixels, or red, green, and blue pixels; or a red pixel, a green pixel, a blue pixel, a white pixel; or a red pixel, a green pixel, a blue pixel, and a white pixel. The photosensitive device 220 is disposed in the non-light-transmitting region P2. In order to enhance the photosensitive effect of the photosensitive device 220, the photosensitive device 220 is made as large as possible, i.e., the non-light-transmitting region P2 is used to form the photosensitive device 220 except for the switching device 222, the scan line 201, and the data line 202.

Further, referring to fig. 15 and 16, fig. 15 shows a structure of an electronic apparatus according to an embodiment of the present invention, fig. 16 shows a cross-sectional structure of the electronic apparatus shown in fig. 15 along the line I-I, and fig. 16 shows only a partial structure of the electronic apparatus. The electronic device is provided with the display module with any one of the implementation structures, and is used for displaying images of the electronic device and sensing biological characteristic information of a target object contacting or approaching the electronic device.

Examples of the electronic devices include, but are not limited to, consumer electronics, home electronics, vehicle-mounted electronics, financial terminal products, and other suitable types of electronic products. The consumer electronic products include mobile phones, tablet computers, notebook computers, desktop displays, all-in-one computers, and the like. The household electronic products are intelligent door locks, televisions, refrigerators, wearable equipment and the like. The vehicle-mounted electronic products are vehicle-mounted navigators, vehicle-mounted DVDs and the like. The financial terminal products are ATM machines, terminals for self-service business handling and the like. The electronic device shown in fig. 15 is a mobile terminal such as a mobile phone, but the display module can be applied to other suitable electronic products, and is not limited to the mobile terminal such as a mobile phone.

Specifically, the front surface of the mobile terminal 3 is provided with a display panel 100, and a protective cover 300 is disposed above the display panel 100. Optionally, the screen ratio of the display panel 100 is high, for example, more than 80%. The screen occupation ratio refers to a ratio of the display area 101 of the display panel 100 to the front area of the mobile terminal 3. The photosensitive panel 200 is correspondingly disposed above the display panel 100 and below the protective cover 300. The light-sensing panel 200 is used to sense predetermined biometric information of a target object contacting or approaching an arbitrary position of the display area 101 of the display panel 100.

When the mobile terminal 3 is in a bright screen state and in the biometric information sensing mode, the display panel 100 emits a light signal. When an object touches or approaches the display area, the light sensing panel 200 receives the light signal reflected by the object, converts the received light signal into a corresponding electrical signal, and obtains predetermined biometric information of the object, for example, fingerprint image information, according to the electrical signal. Thus, the light sensing panel 200 can sense a target object contacting or approaching any position of the display region 101.

The electronic device of the embodiment of the invention has the following advantages:

the sensing device comprises a display panel, a light sensing panel, a light source and a light source, wherein the light sensing panel is attached to the display panel, the light signal emitted by the display panel is used for sensing the biological characteristic information of a target object, and the light source is not required to be additionally arranged, so that the cost of electronic equipment is saved, and the biological characteristic information sensing of the target object at any position of a display area contacting the display panel is realized. In addition, the light sensing module in the display module can be independently manufactured and then assembled with the display device, so that the preparation of the electronic equipment is accelerated.

Secondly, due to the fact that reflection of different parts of the target object on optical signals is different, aliasing exists in the optical signals sensed between the adjacent photosensitive units, and accordingly acquired sensing information is fuzzy.

Thirdly, the photosensitive panel is positioned above the display panel, so that the optical signal reflected by the target object directly reaches the photosensitive panel, thereby avoiding the interference of other substances in the transmission process of the optical signal and improving the sensing precision of the photosensitive module.

Further, the electronic device further includes a touch sensor (not shown in the figure) for determining a touch area of a target object when the target object contacts the protective cover, so that the electronic device performs biometric information sensing in the touch area.

In some embodiments, the touch sensor is integrated with either the protective cover 300, the photo panel 200, or the display panel 100. Through the integrated touch sensor, not only is the touch detection of a target object realized, but also the thickness of the electronic equipment is reduced, and the development of the electronic equipment towards the direction of lightness and thinness is facilitated.

In the description herein, references to the description of the terms "one embodiment," "certain embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and not to be construed as limiting the present invention, and those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments within the scope of the present invention.

Claims

1. An anti-aliasing imaging element for placement on a photosensitive panel, comprising: including the light absorption wall and by a plurality of first light transmission areas and a plurality of second light transmission areas that the light absorption wall encloses, just the sectional area in second light transmission area compares the sectional area in first light transmission area is big, the light absorption wall includes a plurality of light absorption pieces and the bed hedgehopping piece of range upon range of setting in turn, is located different layers the thickness inequality of bed hedgehopping piece for avoid relative sensitization panel vertical direction skew light signal beyond 20 to pass the bed hedgehopping piece, transparent material is filled in first light transmission area and the second light transmission area, in order to increase the intensity of anti-aliasing imaging element, also can avoid impurity to get into in first light transmission area and the second light transmission area and influence the printing opacity effect.

2. The anti-aliasing imaging element of claim 1, wherein: the second light-transmitting area is used for transmitting the detection light beam to an external object, and the first light-transmitting area is used for transmitting the detection light beam returned by the external object.

3. The anti-aliasing imaging element of claim 1, wherein: the heightening block is made of transparent materials.

4. An anti-aliasing imaging element for placement on a photosensitive panel, comprising: the light absorption layer and the transparent support layers are alternately stacked, and the thickness of each transparent support layer is unequal to prevent optical signals which deviate by +/-20 degrees relative to the vertical direction of the light-sensitive panel from penetrating through the transparent support layers between the light absorption blocks; the light absorption layer comprises a plurality of light absorption blocks arranged at intervals, and a plurality of first intervals and a plurality of second intervals are formed among the light absorption blocks; the transparent supporting layer is formed by filling a transparent material, and the first interval and the second interval are filled together, so that the strength of the anti-aliasing imaging element is increased, and the influence of impurities entering the first interval and the second interval on the light transmission effect can be avoided; the area corresponding to the first interval forms a first light-transmitting area, and the area corresponding to the second interval forms a second light-transmitting area.

5. The anti-aliasing imaging element of claim 4, wherein: the thickness of the transparent supporting layer is increased layer by layer.

6. The anti-aliasing imaging element of claim 4, wherein: the second light-transmitting area is used for transmitting the detection light beam to an external object, and the first light-transmitting area is used for transmitting the detection light beam returned by the external object.

7. The utility model provides a sensitization module which characterized in that: the method comprises the following steps:

an antialiasing imaging element located above the photosensitive panel, the antialiasing imaging element being the antialiasing imaging element of any one of claims 1 to 3 or the antialiasing imaging element of any one of claims 4 to 6.

8. The photosensitive module of claim 7, wherein: the anti-aliasing imaging element is directly formed on the photosensitive panel, or the anti-aliasing imaging element is independently manufactured and then arranged on the photosensitive panel.

9. The photosensitive module of claim 7, wherein: the photosensitive module is further used for sensing preset biological characteristic information of a target object approaching or contacting the photosensitive module.

10. The photosensitive module of claim 7, wherein: the photosensitive panel comprises a plurality of photosensitive units, and each photosensitive unit corresponds to a plurality of first light-transmitting areas.

11. The photosensitive module of claim 7, wherein: this sensitization panel is including supplying a plurality of third light transmission areas and the non-light transmission area that the light signal passed, and is equipped with the sensitization unit in the non-light transmission area, and this sensitization unit is used for sensing the light signal to convert the light signal that senses into corresponding signal of telecommunication, the signal of telecommunication is used for acquireing the predetermined biological characteristic information of the target object of contact or this sensitization panel, anti-aliasing formation of image component sets up in sensitization panel top for prevent that received light signal from producing the aliasing between the adjacent sensitization unit, second light transmission area corresponds the setting with third light transmission area, and a plurality of sensitization units correspond the setting with first light transmission area, are used for receiving the light signal that passes this first light transmission area.

12. The utility model provides a display module assembly which characterized in that: the method comprises the following steps:

a display device including a display panel for performing image display;

a photosensitive module disposed above the display panel, the photosensitive module according to any one of claims 7 to 11, configured to sense an optical signal to obtain predetermined biometric information of a target object contacting or approaching the display panel.

13. The display module of claim 12, wherein: the display panel comprises a plurality of display pixels, intervals are arranged between every two adjacent display pixels, a plurality of photosensitive units and a first light-transmitting area are arranged just opposite to each other and used for receiving light signals passing through the first light-transmitting area, a photosensitive panel in the photosensitive module is provided with a third light-transmitting area and a non-light-transmitting area, the photosensitive units are located in the non-light-transmitting area, the third light-transmitting area is located between the photosensitive units and the display pixels are arranged just opposite to each other so that the light signals sent by the display panel can pass through, the second light-transmitting area and the third light-transmitting area are arranged just opposite to each other, and the light signals sent by the display panel are used as detection signals.

14. An electronic device, characterized in that: comprising the anti-aliasing imaging element of any one of claims 1 to 6, or comprising the photosensitive module of any one of claims 7 to 11, or comprising the display module of claim 12 or 13.